[PROBLEM] How to recover Xbian BTRFS snapshot or a dir. from xbian_backup_home_01-01-23.img.gz?

[postcd]

Hello,

I need to recover one folder from the time around 1 week ago or older. Can i do it within Xbian BTRFS or on other computer i have xbian_backup_home_01-01-23.img.gz which i can extract, but do not know if/how to properly mount it while my other computer Linux Debian PC has no BTRFS.

Mounted extracted .img using Disks GUI tool in Debian (seeing loop0 in lsblk output). No available operation to see content.

Quote:sudo losetup /dev/loop1 /dev/shm/xbian_backup_home_01-01-23.img
losetup: /dev/shm/xbian_backup_home_01-01-23.img: Warning: file does not fit into a 512-byte sector; the end of the file will be ignored.

sudo mount /dev/loop{0,1} /mnt/xn
mount: /mnt/xn: wrong fs type, bad option, bad superblock on /dev/loop1, missing codepage or helper program, or other error.

List of BTRFS snapshots is here

The snapshot that looks like the one to restore seems to be:

Quote:ID 3790 gen 868586 top level 261 path home/@btrfs-auto-snap_monthly-2023-07-12-1045

Yet after like 30 minutes i have not found right command/s to restore it.

[postcd]

Mount snapshots subvolume for current session in order to browse directories and files/copy/restore it:

Quote:mkdir /root/btrfs-snapshots;mount -o rw,relatime,ssd,space_cache,subvol=/ /dev/mmcblk0p2 /root/btrfs-snapshots

(/dev/mmcblk0p2 is the device path shown in output of the command: mount|grep "@" )

List content of the /home/user/ directory in one of the snapshots:

Quote:ls /root/btrfs-snapshots/home/@btrfs-auto-snap_daily-2023-04-24-0827/user/

Copy directory from snapshot to its original location:

Quote:cp -a --reflink=always /root/btrfs-snapshots/home/@btrfs-auto-snap_daily-2023-04-24-0827/user/directory /home/user/

(--reflink=always to prevent duplication of files (save disk space))

List snapshots:

Quote:btrfs sub list / -t

Mount snapshots on each boot:

Quote:blkid|grep btrfs

Find out UUID and copy it down, open fstab:

Quote:sudo nano /etc/fstab

append new line inside it:

Quote:UUID="uuidhere" /root/btrfs-snapshots xbian ro,noatime,nodiratime 0 0

(replace uuidhere and xbian[by string that other mount lines in the file has] and replace ro by rw in case you need to write into snapshot filesystem. "ssd" parameter in case of a SSD drive + writing.)

[Nachteule]

I always do this when I need something from a snapshot:

Code:

mount /dev/root /mnt
cd /mnt/
ls -la

This shows you the subvol roots for /root, /home etc.
then

Code:

cd home for example
ls -la

Then you will see all available snapshots of the subvolume
and finally

Code:

cd @....
into the snapshot you want to get the older files from

[frybreadnice]

I usually use Snipping Tools when I want to take a quick snapshot.

[Suzume199x]

You can restore the snapshot. pokedoku

[Mira23]

(25th Oct, 2023 05:28 PM)frybreadnice Wrote:  I usually use Snipping Tools when I want to take a quick snapshot dino game

This tool is quite good, and it is very convenient to use

[TomHiddleston]

great

[lilianna]

You don't need to mount the .imp file separately. It's already part of the BTRFS filesystem. Buckshot Roulette